- Participant is in remission or has recovered from major depression, has substance abuse in the past 6 months, has been diagnosed with any bipolar or psychotic disorder, has been diagnosed with any severe cognitive impairment or dementia, history of cancer (with the exception of skin cancer), has current major psychiatric disorder or other psychiatric or medical comorbidities that would interfere with study participation (e.g. dementia, psychosis, upcoming major surgery, lupus, active heart failure, diabetes, etc., currently has a UTI and/or has had a positive urine culture in the past 6 weeks, and if there was antibiotic use in the last 3 months.